/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors 
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.schema;

import static java.util.Collections.unmodifiableMap;

import jakarta.persistence.EntityManagerFactory;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import lombok.RequiredArgsConstructor;
import org.hisp.dhis.common.IdentifiableObject;
import org.hisp.dhis.schema.introspection.GistPropertyIntrospector;
import org.hisp.dhis.schema.introspection.HibernatePropertyIntrospector;
import org.hisp.dhis.schema.introspection.JacksonPropertyIntrospector;
import org.hisp.dhis.schema.introspection.PropertyIntrospector;
import org.hisp.dhis.schema.introspection.PropertyPropertyIntrospector;
import org.hisp.dhis.schema.introspection.TranslatablePropertyIntrospector;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * Default {@link PropertyIntrospectorService} implementation that uses Reflection and Jackson
 * annotations for reading in properties.
 *
 * @author Morten Olav Hansen <mortenoh@gmail.com>
 */
@RequiredArgsConstructor
@Service("org.hisp.dhis.schema.PropertyIntrospectorService")
public class DefaultPropertyIntrospectorService implements PropertyIntrospectorService {
  private final Map<Class<?>, Map<String, Property>> classMapCache = new ConcurrentHashMap<>();

  private final PropertyIntrospector introspector;

  @Autowired
  public DefaultPropertyIntrospectorService(EntityManagerFactory sessionFactory) {
    this(
        new HibernatePropertyIntrospector(sessionFactory)
            .then(new JacksonPropertyIntrospector())
            .then(new TranslatablePropertyIntrospector())
            .then(new PropertyPropertyIntrospector())
            .then(new GistPropertyIntrospector()));
  }

  @Override
  public Map<String, Property> getPropertiesMap(Class<?> klass) {
    return classMapCache.computeIfAbsent(klass, this::scanClass);
  }

  /**
   * Introspect a class and return a map with key=property-name, and value=Property class.
   *
   * @param klass Class to scan
   * @return Map with key=property-name, and value=Property class
   */
  private Map<String, Property> scanClass(Class<?> klass) {
    if (klass.isInterface() && IdentifiableObject.class.isAssignableFrom(klass)) {
      throw new IllegalArgumentException(
          "Use SchemaService#getConcreteClass to resolve base type: " + klass);
    }
    Map<String, Property> properties = new HashMap<>();
    introspector.introspect(klass, properties);
    return unmodifiableMap(properties);
  }
}
